Pump for oil-wells



(No Model.)

J. E. GIBSON 8v T. D* SUTTGN.

- PUMP FOR OIL WELLS.

UNITED STATES PATENT OEEICE.

JOHN HARVEY GIBSON, OF BRUIN, AND THOMAS DONLY SUTTON, OFCONOQUENESSING, PENNSYLVANIA.

PUMP FOR OIL-WELLS.

SPECIFICATION forming part of Letters Patent No. 504,679, datedSeptember 5, 1893.

Application tiled September 13, 1892. Serial No. 445,804. (No model.)

To @ZZ whom t may concern:

Be it known that we, JOHN HARVEY GIBSON, of Bruin, and THOMAS DONLYSUTTON, of Conoquenessing, county of Butler, State of Pennsylvania,citizens of the United States,havein vented certain new and usefulImprovements 1n Pumps for Oil-IVells; and we do declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethesame, referencebein g had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification.

This invention relates to pumps for oil wells, and has for its object toprovide a cup to catch the rivets that frequently become disconnectedfrom the joints between the parts of the rod employed to move thepistonrod or working valve up and down, and which rivets when they becomedisconnected drop down into the working barrel of the well and seriouslyinterfere with the proper working of the pump or valves and cause injuryto the valve rod or check and other portions of the pump by cutting andwearing the same, and at times become lodged between the working partsof the pump or valves and the working barrel.

The invention is particularly adapted to that class of oil well pumps inwhich is employed a valve of the general form illustrated in thedrawings and which is known in the oil regions as a Crocker check whichremains stationary in the top of the working barrel while the piston orvalve rod reciprocates through the same; but it may also be employedwith the devices which take the place of such a valve. In constructionof the kind wherein the valve or piston rod reciprocates, the rodbecomes seriously injured by these loose rivets dropping down theworking bar rel and bearing against the rod, and also by getting underthe valve during its reciprocation. This invention seeks not only tocatch the rivets and thus prevent them from dropping down to and belowthe Crocker check and working valve which are much damaged when they aredrawn past the rivets extricat ing the rods, but also to hold the rivetsaway from the valve or piston rod after they have dropped into the cupwhich catches them so that after they are caught they will be held awayfrom the reciprocating rod and will not be iioated up and down with theoil in the working barrel, which if permitted will abrade the smoothsurface of the barrel and impair its efficiency.

To the accomplishment of the foregoing objects and such other objects asmay hereinafter appear, the invention consists in the construction andcombination of parts hereinafter particularly described, and thensoughtto be specifically setforth by the claims.

Figure l is a vertical section of a portion of an Oil well pump with ourinvention applied, the valve rod being in full lines. Fig. 2 is aperspective view of the rivet catching cup. Fig. 3 is a top plan view ofthe same. Fig. 4 is a section through the valve rod sleeve; and Fig. 5is a side view of the valve.

In the drawings numeral l designates the tubing ordinarily employed inoil wells, and 2 the ordinary working barrel which ordinarily is aboutone-quarter of an inch less in diameter than the inside of the tubing soas to form a shoulder 3 on which rests the portion 4 ofthe valve casing.The parts and their construction below the valve will be the same asunder the common construction'generally in use and therefore need not beillustrated as the same is not necessary to a clear understanding ofthis invention.

The cup constituting this invention is designated by the numeral 5, andin diameter is about one-eighth of an inch smaller than the insidediameter of the tubing l, thus leaving a space sufficient between thecup and the tubing to allow the cup to be withdrawn when the valve andother parts are taken out for the purpose of repairs, and yet not spacesufficient to allow the detached rivets, whole or broken, to passbetween the cup and the tubing. This cup has a perforated bottom so thatthe oil may pass freely up through the cup and is also formed in itsbottom with a central aperture or opening 6 so that it may be slippedover a tubular extension 7 rising from the top of the portion et whichforms a support for the cup, and around this opening 6 it is formed witha depending flange or collar ICO ' immovably in place above the valve.

8, so that set screws 9, three or more, may pass through this collar andbear against the tubular extension 7 so as to secure the cup Vith thecup so constructed and applied it is held firm and immovable and willcatch the rivets that may become detached from the operating partsabove, and being immovable will not throw the rivets against the valveor piston rod 10 which reciprocates through the cup and portion below.With the further view of preventing the loose rivets from coming incontact with the reciprocating piston or valve rod, we place a sleeve llaround the valve rod in line with the opening 6 in the bottom of the cupwhich brings it within the cup between the valve rod and rivets whichwill lie loosely in the cup, said sleeve being preferably as high as thetop edge to the wall'of the cup, thus effectually shielding thereciprocatingvalve or piston-rod from any abrasion or cutting whichwould result if theloose rivets were allowed to come in contact with thepiston rod which reciprocates through the stationary cup. This 'sleevehowever mayl be omitted if the tubular extension? from the portion 4: becarried out to the top vedge of the wall of the cup. In orderto havethis cup serve its purpose to the fullest extent so as to prevent injuryvfrom the detached and loose rivets to any partof the pump, it isnecessary that the cup should be immovable and that there should be aprotecting sleeve between the rivets in the cup and the piston rod whichreciprocates through the cup, andv these results are obtained by theconstruction described, and the serious inconvenience, and injuryexperienced under constructions at present in use are overcome andprevented.

We have described with particularity the details `of construction andarrangement of the cup and its interior Iprotecting shield or sleevebetween it and the reciprocating piston rod, but-we do not coniineourselves to such details where the same results can be obtained byimmaterial alterations in such details.

rable from said extension and formed with a `perforated bottom and acentral aperture to lit around said tubular 'extension and provided witha depending collar or ange'around "said aperture,'and securingmeans-'passed through saidcollar'and bearingagainst said tubularextension to hold sai-d cup immovably in place while permitting-thefplston rod to reciprocate through the` sameysaid-tubular extensionextending through the cup to form a shield to prevent loose rivets'inthe cup from coming in contact with the reciprocating rod,

scribed.'

3. The combination with the tubular exten-1 sion supported around thepiston rod, and thesubstantially as and forvthe purposes-de-lreciprocatingpiston rod, of a cup having a perforated bottom and heldimmovably uponsaid extension, and a sleeve resting-lon said extensionand madevseparate from and located inside the cup between it and thereciprocatingpiston rod to shield the 4rod in-its reciprocationthroughthe Ycup from loose rivets caught'and retained by the cup,substantially as and for the purposes described.

In testimony whereof we affix oursigua'tures" in presenceof twowitnesses.

JOHN HARVEY GIBSON. THOMAS DONLY SUTTON.- Witnesses:

R. P. DAUBENSPECK, V. F. T. KELLY.

